IDENTIFICATION OF LETTUCE GROWTH WITH LIGHT INPUT

摘要

Using a system identification method, a time variant transfer function of photosynthetically photon flux density and fresh weight of a lettuce was conducted. As for models, ARX, ARMAX, OE, BJ models were considered. The recursive least squares method was adopted to the four models. Output estimation, which was obtained from ARX and ARMAX models, showed good fit to measured output.